Let me refer you back to post#4
Perhaps you dont need to do anything. What is your "all-in-timing" now? With oem or oem-type iron 318 heads, power-timing usually falls between 32 and 36 degrees.
Doing the math 36 less 16 = 20*, and 32 less 18 = 14*. So you are hoping for an average of those two; (20 +14)/2=17* of centrifugal in the dizzy.Thats 17 +/- 2or3 degrees
What I would do is this; Start her up with the timing lite hooked up. Rev it up to as high as necessary such that the dizzy stops advancing. Record that rpm and that timing. Let the engine idle for a couple of minutes, to cool off.While its doing that, compare your maximum number to 36*. That is the amount that the power timing would have to be changed to bring it to 36*. It also the amount that the idle-timing will need to be changed.So just reset the idle-timing that amount. Then retest the maxtiming at the previously obtained maxtiming RPM . All good? ok then lets look at the numbers.
What is the idle-timing adjusted to ,for the 36*of power timing? You are looking for a 17 +/- 2or3 degree spread. If you dont have it, now its time to mod the dizzy.
